I’ve done a lot of research on these laptop tents, and this is the one I’m grabbing for summer outdoor work! The LAPTOP TENT is a total game changer — portable, sun-shading, water-resistant, and even converts into a tote for your laptop, towels, drinks & more! 
It features heat & UV reflective fabric, a privacy hood, and glare shield so you can actually see your screen outside. I linked a few other great options below too, at all different price points! 
XO, Maire